CVE-2011-2521
MEDIUM · CVSS 4.9EPSS 0.4%EU EUVD
The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.
Key facts
- CVSS score
- 4.9 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:L/AC:L/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-189
- EPSS score
- 0.4% (34th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-2506)
- Published
- May 24, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-2506 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- linux / linux kernel
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39(Broken Link)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc66c5210ec2539e800e87d7b3a985323c7be96e
- http://www.openwall.com/lists/oss-security/2011/07/06/4(Mailing List, Third Party Advisory)
- https://bugzilla.redhat.com/show_bug.cgi?id=719228(Issue Tracking, Third Party Advisory)
- https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e(Patch, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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